package com.itheima.filter;

import com.itheima.common.R;
import com.sun.prism.impl.BaseContext;
import org.springframework.util.AntPathMatcher;
import com.alibaba.fastjson.JSON;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "loginCheckFilter",
        urlPatterns ="/*" )
public class LoginCheckFilter implements Filter {
    public static final AntPathMatcher PATH_MATCHER
            = new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        String requestURI = request.getRequestURI();
        String[] url = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login"

        };
        boolean check = check(url,requestURI);
        if(check){
            filterChain.doFilter(request,response);
            return;
        }

        if(request.getSession().getAttribute("employee") != null){
            filterChain.doFilter(request,response);
            return;
        }


        if(request.getSession().getAttribute("user") != null){
            filterChain.doFilter(request,response);
            return;
        }
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;

    }

    private boolean check(String[] url, String requestURI) {
        for (String s : url) {
            boolean match = PATH_MATCHER.match(s, requestURI);
            if (match){
                return true;
            }
        }
        return false;
    }
}
